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Series: 300th Anniv of Publication of Komensky «Opera Didactica Omnia»
Czechoslovakia, 1957, 40 h. 11 (1/2). green
Catalogues: Michel: 1010POFIS: 929Scott: 792Stanley Gibbons: 968Yvert et Tellier: 897
Plots: Komensky Jan Amos. «Orbis Sensualium Pictus»
Czechoslovakia, 1957.03.28, Prague. Opera Didactica Omnia